package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.core.toolkit.BeanUtils;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;


import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
   private StringRedisTemplate stringRedisTemplate;


    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            //2.如果符合返回错误信息
            return Result.fail("手机号格式错误");
        }
        //符合，生成验证码
        String code = RandomUtil.randomNumbers(6);
        //保存验证码到redis,
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_CODE_TTL,TimeUnit.MINUTES);
        //发送验证码
        log.debug("发送验证码成功{}",code);
        //返回ok
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
         //1.校验手机号和验证码,不一致报错
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号格式错误");
        }
        //从redis获取验证码并校验
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone);
        String code = loginForm.getCode();
        if (code == null || !cacheCode.equals(code)){
            return Result.fail("验证码错误");
        }
        //一致，根据手机号查询用户 select * from tb_user where phone = ?
        User user = query().eq("phone", phone).one();
        //判断是否存在
        if (user == null){
            //不存在创建新用户并保存
           user = createUserWithPhone(phone);
        }
        //保存用户信息到redis中
        //生成token，将user对象转换成hashMap储存,储存
        String token = UUID.randomUUID().toString(true);
        UserDTO userDTO = BeanUtil.copyProperties(user,UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create().setFieldValueEditor((fieldName,fieldValue) -> fieldValue.toString()));
        String tokenkey = LOGIN_USER_KEY+token;
        stringRedisTemplate.opsForHash().putAll(tokenkey,userMap);
        //设置有效期
        stringRedisTemplate.expire(tokenkey,LOGIN_USER_TTL,TimeUnit.MINUTES);
        return Result.ok(token);
    }
    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName( USER_NICK_NAME_PREFIX +RandomUtil.randomString(10));
        save(user);
        return user;
    }
}
